Solve this:

​Q3. There is an all time discount of  20% on all items in Mr Lal's shop. During festive season, Mr Lal gives an additional discount of 5% on each of the following items. Find the final selling price of each item.

                                         S.P
     a) Costume            Rs.    500

     b) table fan            Rs. 1,000

     c) crockery set       Rs. 1,700

     d) vase                   Rs.    600